0

This KVM host is only running one VM/guest right now, and it is running with -smp 1. Top shows only the first core being active. Is that expected when using -smp1? The guest OS is Windows XP. The host is not running much else outside of KVM. OS is CentOS 6.3, libvirt 0.10.

It just seems like a waste to have 7 idle cores.

3

with smp 1 the VM will only have one thread on the host acting as it's CPU, so it will only use one host core at a time. Normally, there's no point in giving a VM more cores that it actually needs, with those free cores, you can start and run more VMs, or run apps on the host itself

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy